Hobbits and Music

Fan and author Jan Howard Finder (aka Wombat) has posted A request to fans of JRR Tolkien and The Lord of the Rings: I’ve been intrigued by the impact of The Hobbit and The Lord of the Rings on popular music in the 1960s and 1970s.
I would love to have a paper on this topic for my third Conference On Middle-earth (scheduled for 26 March 2011 in Westford, Massachusetts).
Any musicians/historians of popular culture out there?
The number of platinum record selling groups that began by singing hobbit songs in small bars and cafes is very large.
He’s seeking responses in this LinkedIn question.